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Subject[PATCH v2 4/5] exit: use task_alive() in do_wait()
Date
Replace hlist_empty() with the new task_alive() helper which is more
idiomatic, easier to grep for, and unifies how callers perform this check.

Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---
/* v1 */
patch not present

/* v2 */
patch introduced
---
kernel/exit.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/exit.c b/kernel/exit.c
index a46a50d67002..2bb0cbe94bda 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1457,7 +1457,7 @@ static long do_wait(struct wait_opts *wo)
*/
wo->notask_error = -ECHILD;
if ((wo->wo_type < PIDTYPE_MAX) &&
- (!wo->wo_pid || hlist_empty(&wo->wo_pid->tasks[wo->wo_type])))
+ (!wo->wo_pid || !task_alive(wo->wo_pid, wo->wo_type)))
goto notask;

set_current_state(TASK_INTERRUPTIBLE);
--
2.23.0
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